Air filter



FIG. 1 is a front perspective view from the right side of the airfilter;

FIG. 2 is a front view of the air filter of FIG. 1;

FIG. 3 is a rear view of the air filter of FIG. 1;

FIG. 4 is a left side view of the air filter of FIG. 1;

FIG. 5 is a right side view of the air filter of FIG. 1;

FIG. 6 is a top view of the air filter of FIG. 1; and,

FIG. 7 is a bottom view of the air filter of FIG. 1.

Any portion of the article depicted in broken lines forms no part of theclaimed design. Broken lines formed by equal length dashes showunclaimed portions of the design.

CLAIM We claim the ornamental design for an air filter, as shown anddescribed.